Saci XV-F Serie Instrucciones De Instalación Y Funcionamiento página 19

XV/XVI/XV-F SS Vertical Multi-stages Centrifugal Pumps
should be drained to prevent damage from freezing.
7.2 Others (Only for XV, XVI & XVF-SS 1, 3, 5 series)
For these pumps, it is advisable to open the
bypass valve during start-up. The bypass valve
connects the suction and discharge sides of the
pump, thus making the filling procedure easier.
When the operation is stable, the bypass valve can
be closed.
If the pumped liquids contains air, it is advisable to
leave the bypass valve open if the operating pressure
is lower than 6 kg/cm². If the operating pressure constantly
exceeds 6 kg/cm², the bypass valve must be closed.
Otherwise the material at the opening will be worn because
of the high liquid velocity.
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